/*
 * Copyright (c) 2012 Jonathan Tyers
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package uk.org.uplink.guicemodulescanner;

import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;

/**
 * Instantiates classes by calling null-constructors.
 * 
 * @author jonny
 */
public class SimpleReflectionInstanceCreator {
	/**
	 * Instantiates the given class using the null-constructor.
	 * 
	 * @param clazz
	 *            the class to instantiate
	 * @return
	 * @throws RuntimeException
	 *             if the class does not have a public null constructor, or the instantiation failed
	 */
	public <T> T createInstance(final Class<? extends T> clazz) {
		try {
			Constructor<? extends T> constructor = clazz.getDeclaredConstructor();
			return constructor.newInstance();

		} catch (InstantiationException e) {
			throw new RuntimeException("Failed to create instance of " + clazz.getName(), e);
		} catch (IllegalAccessException e) {
			throw new RuntimeException("Failed to create instance of " + clazz.getName(), e);
		} catch (InvocationTargetException e) {
			throw new RuntimeException("Failed to create instance of " + clazz.getName(), e);
		} catch (SecurityException e) {
			throw new RuntimeException("Failed to create instance of " + clazz.getName(), e);
		} catch (NoSuchMethodException e) {
			throw new RuntimeException("Failed to create instance of " + clazz.getName(), e);
		}
	}
}
